Tag: Refrigeration

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What is the principle of refrigeration in food preservation?

The basic principle of food preservation includes: Preservation or delay of microbial decomposition: That is archived by : Keeping out microorganisms (asepsis) Removal of microorganisms,i.e., by filtration. Click to see full answer What is principle of refrigeration and why refrigeration is required? The Refrigeration basic principle is that with the aid of a heat pump,…
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How much electricity does a freezer use per hour?

The most common cost to run a freezer is $0.16 per day, $4.92 per month and $59.10 per year. Overall, it costs between $0.06 and $0.27 per day to run a freezer. Click to see full answer Does a freezer use more electricity than a fridge? In general, refrigerators with top-mounted freezers use less energy…
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What is the formula of coefficient of performance of refrigerator?

The coefficient of performance of the fridge is the refrigerating effect per cycle, Q1, divided by the net work done on the fridge per cycle, and, for a Carnot cycle it can be calculated from T1/(T2 − T1). Click to see full answer What is the formula of COP? COP (Coefficient of Performance) COP is…
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What is the difference between a chest freezer and upright freezer?

If your power goes out, food will spoil faster when it's in an upright freezer. It will generally stay frozen for one to two days, which may or may not be long enough, depending on where you live. Shorter Lifespan. Uprights tend to have a shorter lifespan than chest freezers. Click to see full answer…
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Is a fridge a Carnot cycle?

The compressor is the most important component of a refrigerator, as it regulates the compression and circulation of refrigerant to generate cold air. This is the combination of various advanced technologies, including a motor, refrigerant compression and super-precision processing. Click to see full answer Does a refrigerator have an engine? The refrigerator compressor is both…
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How is COP of Vapour compression refrigeration system calculated?

1. What is the formula for COP of an ideal vapour absorption refrigeration system? Explanation: The COP of an ideal vapour absorption refrigeration system is the ratio of the heat given to the refrigerant in the generator and the heat absorbed by the refrigerant in the evaporator. COP = \frac{Q_e}{Q_g}. Click to see full answer…
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What are the classification of refrigerants?

There are four main groups of refrigerants and they are determined by their chemical constituents but are generally classified as Chlorofluorocarbons (CFCs), Hydro chlorofluorocarbons (HCFCs), Hydro fluorocarbons (HFCs) and Natural Refrigerants [7]. Click to see full answer What are the types of refrigerant? Older refrigerants have been phased out due to their environmental impact and…
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What kind of Freon does a freezer use?

Most modern lab-grade freezers use R404A refrigerant, which has a GWP of 3,920. Ultra-low temperature freezers also use R508B as the secondary refrigerant, which has a GWP of 13,396. Natural refrigerants are the most environmentally-friendly option. Click to see full answer What kind of Freon does a freezer use? While R-12 was once the go-to…
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What are the types of refrigerant?

There are four main groups of refrigerants and they are determined by their chemical constituents but are generally classified as Chlorofluorocarbons (CFCs), Hydro chlorofluorocarbons (HCFCs), Hydro fluorocarbons (HFCs) and Natural Refrigerants [7]. Click to see full answer What are the two types of AC refrigerant? There are many different types of refrigerant used in a…
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What do you understand by coefficient of performance of refrigerator?

The coefficient of performance, COP, of a refrigerator is defined as the heat removed from the cold reservoir Qcold (i.e., inside a refrigerator) divided by the work W done to remove the heat (i.e., the work done by the compressor). The COP strongly depends on outside temperature and required indoor temperature. Click to see full…
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